SCodeFlatten causes scripting API to stop working

[Martin Sjölund]

loadString("
model N
  Integer Spring[:] = {1,2,3,4};
end N;

model M
  extends N(Spring[:] = {1,2,3});
end M;
");
getClassNames();getErrorString();

Compiler/FrontEnd/SCodeUtil.mo:        Error.addSourceMessage(Error.SUBSCRIPTED_MODIFIER, {}, info);

The above model is illegal according to SCodeFlatten, but the class should simply be invalidated. If we load this class, OMEdit, is now unable to delete or add classes, etc (getClassNames no longer returns a value).

[Martin Sjölund]

This was fixed by not inserting code that causes SCode to fail